{"instruction": "You are an expert in named entity recognition. Please extract entities that match the schema definition from the input. Return an empty list if the entity type does not exist. Please respond in the format of a JSON string.", "schema": ["Chemical"], "input": "Based on this understanding , bamboo - type TiO 2 nanotubes with large surface area and excellent interconnectivity are achieved by cycling high and low applied potentials ."}
{"Chemical": ["TiO 2"]}